Compressor
Compress Image Under 500KB
Shrink a photo below 500KB for free, right in your browser. This is a generous limit typically used by email attachment caps and web forms that just need to keep file sizes reasonable, not razor-thin.
Compress Under 500KB
Upload photos and each one is compressed to fit your target size automatically - all in your browser, nothing uploaded, no account needed.
Drop your photos here
JPG, PNG, WebP, GIF, BMP, or HEIC - up to 40 photos, processed entirely in your browser.
How This Compares to Other Compressors
Plenty of sites will compress a photo to a target size, but most upload your file to a server first (even if they delete it later), cap how many images you can process, or quietly convert formats without explaining why. This one is built to be fast, honest, and private at any volume.
Typical online compressors
- closePhoto uploaded to a server, deleted after 25 min - 2 hours
- closeBatch uploads often capped (commonly 10 images)
- close"Exactly" sizing implied but never actually guaranteed
- closeNo explanation for why a "under 100KB" file still gets rejected
- closePNG output claimed for target sizes it can't reliably hit
Crest Convert
- checkRuns entirely in your browser - photos never uploaded, ever
- checkNo cap on how many photos you compress in a batch
- check"Exactly" mode is honest about being closest-fit, not a false promise
- checkBuilt-in KB vs KiB safety margin so portal rejections stop happening
- checkPNG export via resize to hit the target, not a fake quality slider
Why 500KB?
500KB rarely requires any visible quality trade-off for typical photos, making it a safe target when a platform's limit is looser but a full-resolution phone photo (often 3-8MB) still needs trimming down.
Where This Size Limit Shows Up
Email attachments
Many email providers and support ticket systems cap individual image attachments.
Web contact forms
Forms that accept photo uploads (returns, complaints, listings) often set a moderate size cap.
Job application portals
Workday, SAP SuccessFactors, and most ATS platforms cap profile photo uploads to a strict size.
University & exam admissions
Admission portals and competitive exam registration systems commonly enforce a fixed photo size.
Need a different format first?
If your photo comes straight from an iPhone, it may be saved as HEIC - if you'd rather convert it to JPG separately before compressing, or your portal rejects HEIC outright, use the converter below. This compressor also accepts HEIC directly if you'd rather skip that step.
More Target Sizes
Under a size limit
Closest fit to a size
Frequently Asked Questions
Will my photo lose noticeable quality at 500KB?
Almost never for standard photos - 500KB is a comfortable target that usually only requires a mild quality reduction, with dimensions typically left untouched.
What does 'KB' actually mean here - is it exact?
We use decimal kilobytes (1 KB = 1,000 bytes), which is how most upload portals actually measure a size limit, and slightly smaller than the 1,024-byte 'KiB' your operating system sometimes shows in file properties. That gap is exactly why files that look fine on your desktop can still get rejected - we build a safety margin into 'Under' mode so you don't get caught by it.
Does this really process my photo without uploading it anywhere?
Yes, genuinely - not just 'deleted after a few minutes' like some compressors. The compression runs using your browser's own image encoder, so your file never leaves your device at any point. That matters most for the exact kind of images people compress for this - passport photos, ID scans, signatures, and headshots.
Can I export as PNG?
Yes. Choose PNG in the format toggle. PNG is lossless, so there is no quality slider - the tool finds the largest image dimensions that still fit under your target by resizing. Tight targets (like 20KB) may need more downscaling in PNG than JPG would, but portals that specifically require PNG will accept the output.
Will this work with HEIC photos from my iPhone?
Yes. HEIC files are decoded right in your browser before compression starts, the same as every other format here - so you can drag in photos straight from your iPhone without converting them first.
Is there a limit on how many photos I can compress?
No account, no daily cap, and no per-batch fee. Upload as many photos as you need in one go and download them individually or as a ZIP.